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Peter, I installed a certified oil separator on my o-200 and was very happy with the results! I assume you are talking about the crankcase vent tube pushing oil on the bottom of the aircraft? After I installed the one I have now I found one on Sonex Aircrafts website. In the Aero Vee section under accessories, 100.00, not the 350.00 you will pay for the certified one..... I believe you could adapt it to fit the 750. Typically it goes inline on the vent line and then returns to the pushrod cover via a bulkhead fitting w/ o-ring. If there is a low pressure port or plug into the crankcase that is another route. I didn't find one on my o-200. I just put 10 hrs on mine this weekend and spent 5 minutes wiping down the belly! It was clean compared to before.. Let me know if I can help, Jim
Where are you loosing oil from, and how much how fast?
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